Shaft keying device.



W. DECKER.

SHAFT KEYING DEVICE.

APPLICATION FILED SEPT. 18. 1915.

Patented Nov. 21, 1916.

WITNESSES:

UNITED STATES PA TENT OFFIQE.

WARD DECKER, or owneo, NEW YORK.

SHAFT KEYING DEVICE.

Application filed September 18, 1915.

1 0 all whom it may concern:

Be it known that I, l/VARD Dnonnn, a citi- Zen of the United States, residing at Owego, in the county of Tioga and State of New York, have invented a new and useful Shaft Keying Device, of which the following is a specification.

My invention relates to improvements in shaft keying devices where mechanical members are held on cylindrical shafts; and the objects of my improvement are, first, to provide simple and inexpensive means for preventing rotary and axial movement; second, to eliminate shoulders and set-screws for preventing longitudinal movement of members on shafts; third, to provide means for keying members on shafts without projections beyond the member keyed and at the same time prevent longitudinal movement; and fourth, to provide a practical device for keying members to hollow shafts with thin walls. I attain these objects by the mechanism illustrated in the accompanying drawing, in which a Figure 1 is a view of the shaft and keyseats, together with a key and sleeve; Fig. 2, a sectional view showing my method of keying an armature and commutator to a shaft; Fig. 3, is a sectional view and elevation of a collar keyed to a hollow shaft; and Fig. 4, another style of key and ke vway.

Similar numerals refer to similar parts throughout the several views.

I prefer to construct my invention in the following manner, but, as shown hereafter, it may be constructed in other ways.

In Fig. l, 10 is a straight shaft without shoulders in which two holes 27, 27 are drilled to a predetermined depth. A sleeve 17, whose internal diameter is a fit on shaft 10, is headed or beaded over at one end 17*, and is also drilled through one side at 29, 29, and these holes are the same size and so located that they coincide with the shaft holes 27, 27, when the sleeve is mounted on the shaft. A key 15 is formed from round rod or wire, with the ends bent at right angles to the body and parallel with each other and at such a distance apart that they will fit into the holes 29, 29 in sleeve 17.

In Fig. 2 a sectional View of a shaft 22 is shown drilled to a short depth at 14, 14.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Serial No. 51,411.

A sleeve 17, with headed end 17, of brass, steel, or other comparatively soft or ductile material, provided with holes similar to 29, 29, in Fig. l, is mounted on the shaft so that the sleeve holes coincide with the holes drilled in the shaft. The ends of bent key 15 are inserted through the sleeve holes into holes let, 1% in the shaft. End piece 12, armature laminations 12, and end piece 12", provided with key-ways shown at 19, are passed over the shaft 22 and key 15 against the headed end l7 until the sleeve is nearly filled, when the end 17 is headed or beaded over against end piece 12", thereby securely holding the armature from rotation or endwise movement on the shaft. An outline of a commutator 23, also in section, is shown keyed to the shaft in the same manner. This is particularly applicable to small electric motors; no machine work is required on the shaft except drilling the two small holes; and there are no projections on either end of the commutator or armature to take up room and interfere with the winding.

In Fig. 8 is shown an application of my invention to hollow shafts, whereby gears, collars, or other members may be securely fastened in place without projections either inside or outside the shaft. The hollow shaft 25 and sleeve 17 are drilled as shown for the reception of the ends of the keys 15, 15. The sleeve being mounted on the shaft and the keys inserted, the collar 26, keyseated at 19, 19, is pressed over the sleeve and keys against the headed or beaded sleeve end 17 after which, by the use of a suitable tool, the sleeve end 17 is beaded over against the collar 26. It will be noted that there are no projections on the inside of shaft 25, and that it may be mounted upon another shaft passing through its interior. lVhere greater economy of space must be secured it is obvious that the collar 26 may be slightly counter-bored and the ends 17 and 17 headed into the counterbore, leaving absolutely no projecting parts. Fig. 3 shows that where greater strength is desirable, two or more keys 15 may be used with the same sleeve.

- In Fig. l is shown an optional way of employing my invention in which the ordinary straight key 9 and keyseat 8 are used. In this construction the sleeve 17 is provided with a slot 7 instead of the two holes previously described. The application is the same. a

I claim:

l. A shaft provided with a suitable depression, a member provided with a keyway and mounted on the shaft, a sleeve pro: vided with a radial opening and interposed between the member and the shaft and headed over at each end against the member, all in combination with a key lying in the keyway and projecting through the opening in the sleeve into the depression in the shaft. 7

2. A shaft provided with suitable holes, a member provided with a keyway and mounted on the shaft, a sleeve provided with radial holes registering with the shaft holes and interposed between the member and the Copies of this patent may be obtained for the member, all in combination with a key lying in the keyway and projecting through the holes in the sleeve into the holes in the shaft.

3. A shaft drilled radially with two holes a keyseated member, a sleeve provided with 7 WARD DECKER.

lVitnesses:

J. E. SHEEHAN, GERTRUDE DECKER.

five cents each, by addressing the Commissioner of Patents. Washington. D. G. 

